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#2
03-15-2009, 12:33 PM
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Re: what is a Lt1?
Yes, the 5.7 is the LT1. The LT1 uses reverse cooling (meaning cylinder heads get cooled first), sequential port injection, and a front-mounted distributor (mounted between the block and water pump, which is camshaft driven on the LT1). These improvements (namely the reverse cooling) allowed GM to bump the compression up over 10:1 while still being able to run on regular pump gas. This, along with the sequential port injection, allows the engine to produce more power over a wider range of RPM, all the while enjoying increased fuel economy.
The Caprice got the LT1 because it's a heavy car, and the LT1 produces healthy torque over a relatively large portion of the engines' RPM capability.
__________________
1988 9C1 - Modified LM1 @ 275HP/350TQ - TH700R4 - 3.08 8.5" Disc Rear - see it at http://www.silicon212.org/9c1! 2005 Crown Vic P71 - former AZ DPS - 4.6 liters of pure creamy slothness! 1967 El Camino L79/M20 old school asphalt raper Remember - a government that is strong enough to give you everything you need, is also strong enough to take everything you have. 
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#3
03-15-2009, 02:16 PM
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Re: what is a Lt1?
Quote:
the LT1 has no belt driven fan on most .the water pump is rotated by the camshaft ... show us what this engine looks like... the forum here has LT1 pictures does it look like these ..? I just checked this out on the fan...it appears that some vehicles came with the heavy duty cooling and this then has a fan driven by a belt...
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#4
03-15-2009, 02:17 PM
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Re: what is a Lt1?
Quote:
__________________
Thought for the Day… Alcohol does not make you fat - It makes you lean... against tables, chairs, floors, walls and ugly people.  If a prostitute here in America loses her job to a prostitute in India , is that considered "outwhoring"??-Jay Leno
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#5
03-28-2009, 10:22 AM
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Re: what is a Lt1?
All the mechanical fan is really good for is sapping power and making noise. VERY common for folks to rip it out and put a second electric fan in it's place.
__________________
96 Caprice Medium Garnet Red 11.56 at 115.9mph naturally aspirated 94 Caprice wagon, rotted out POS
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#6
03-28-2009, 10:38 AM
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Re: what is a Lt1?
The LT1 was put in Buick Roadmasters too,same body style.I know someone that has a Buick Roamaster with a LT1 under the hood.Plus it is a popular engine to put under the hoods of street rods since it is set up already,350 CID 350 HP
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#7
03-28-2009, 11:11 AM
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Re: what is a Lt1?
Quote:
__________________
Thought for the Day… Alcohol does not make you fat - It makes you lean... against tables, chairs, floors, walls and ugly people. If a prostitute here in America loses her job to a prostitute in India , is that considered "outwhoring"??-Jay Leno
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#8
03-28-2009, 12:53 PM
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Re: what is a Lt1?
LT1 was the only engine offered in the 94-6 Roadmaster(sedan and wagon), Fleetwood, Caprice Wagon, and Impala SS. There was a 4.3L V8 version of it called the L99 that was the base engine in the Caprice sedan both 9C1(police) and civilian and both of those were available with the LT1 option.
In case some of you did not know L99 and LT1 are the engine option codes from the SPID label, that is how the engines are "named".
__________________
96 Caprice Medium Garnet Red 11.56 at 115.9mph naturally aspirated 94 Caprice wagon, rotted out POS
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#9
03-28-2009, 04:18 PM
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Re: what is a Lt1?
It was put in the Camaros and Trans Ams too until I believe 1997.It was replaced with the LS1
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#10
03-29-2009, 12:35 PM
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Re: what is a Lt1?
and vette through 96.
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96 Caprice Medium Garnet Red 11.56 at 115.9mph naturally aspirated 94 Caprice wagon, rotted out POS
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what is a Lt1?
